it is planned to operate four days a week. The operation is fully
automatic, a worker with special knowledge in wastewater management
takes over the monitoring. All data is fed directly into
the plant’s overall control system. The DyVaR-60 plant was delivered
completely pre-assembled in three sea containers, which
only had to be placed on top of each other and connected to
the periphery.
The RO permeate is concentrated according to the familiar principle
of evaporation, but the plant design is completely different
from what is known in the dairy industry as a vacuum evaporator.
The single-stage concentration takes place in a battery of relatively
small cyclones, which are evenly charged with the permeate
(5% dry matter). In order to be able to process the highly aggressive
permeate at all, the DyVaR plant is made of GRP.
The inflow is designed for a maximum of 86 m³ per day, the
permeate passes through the cyclone system several times until
a concentration level of 50 – 55% is reached. Approximately
ten percent of the feed is discharged as concentrate, the majority
of the rest is vapour, which is compressed in series by three
compressors. The vapour condensate is first treated in an aerobic
bioreactor and then filtered in an RO equipped with a ceramic
membrane and is then used in the evaporative coolers and as
boiler feed water. The concentrate is stacked and later transported
in a silo truck to the fertiliser manufacturer. Energetically, the
DyVaR plant requires relatively little input, as a consistent heat
exchange is carried out. Process control in the highly acidic range
also offers advantages in cleaning, because fouling can be largely
prevented by suitable flow rates.
Upcoming auction
Closing complete Dutch cheese plant -
June 2021
Various lines - machines - tanks - components
dfm-auctions.com
26-05-2021
-
16-06-2021
View into the inner workings of the DyVaR process
(photo: mi, Lactoprot)
May/June 2021 ¦ international-dairy.com · 25
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